20 students picked randomly for an experimental group to receive instructional program.
30 students chosen as control group do not receive instructional program.
Experimental group mean is 38 with a standard deviation of 3.
The control group has a mean of 35 with an estimated population standard deviation of 5.
Using .05 level what can be concluded?
Step by step method for testing the hypothesis under 5 step approach is discussed here. Excel template for each problem is also included. This template can be used to obtain the answers of similar problems.